APA (7th ed.) Citation

National Audubon Society & Alden, P. (1998). National Audubon Society field guide to the Pacific Northwest. Knopf.

Chicago Style (17th ed.) Citation

National Audubon Society and Peter Alden. National Audubon Society Field Guide to the Pacific Northwest. New York: Knopf, 1998.

MLA (8th ed.) Citation

National Audubon Society and Peter Alden. National Audubon Society Field Guide to the Pacific Northwest. Knopf, 1998.

Warning: These citations may not always be 100% accurate.